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Standard XII
Biology
Species Diversity
Question

Which of the following helps in maintaining species diversity in a community?

  1. Omnivores
  2. Predators
  3. Herbivores
  4. Facultative parasites

A
Predators
B
Herbivores
C
Facultative parasites
D
Omnivores
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Solution
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Species diversity is defined as the number of different species in a given community. The species diversity in a community is maintained by predators. Predators are organisms that feed on prey. They can increase, decrease or leave unchanged species diversity. They increase species diversity by preying on competitive dominant species and reduce species diversity by reducing consumer pressure on foundation species.
Thus, the correct answer is 'Predators.'

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Q1
Which of the following helps in maintaining species diversity in a community?

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Q2
Which of the following can be possible benefits of predation?

1. It helps in transfer of energy in an ecosystem
2. It helps maintain ecosystem stability
3. Helps in maintaining species diversity
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Q3
Choose the correct statements.
(a) Maintaining ecological processes help in wildlife conservation.
(b) Enriching wildlife diversity with exotic species ensures wildlife conservation.
(c) Preventing migration of species help in wildlife conservation.
(d) Maintaining biodiversity helps in wildlife conservation.

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Q4
Identify the correct statements from the following.
(I) Predator helps in maintaining species diversity
(II) A lion eating a deer and a sparrow eating grain are ecologically similar in being consumers
(III) Predators ultimately lead to the extinction of prey species
(IV) Production of chemicals such as nicotine, strychnine by plants are metabolic disorders

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Q5
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(a) A lion eating a deer represents predator-prey relationships.
(b) Predator star fish, pisaster, helps in maintaining species diversity of some invertebrates.
(c) Predators ultimately lead to extinction of prey species
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